Ancient human, animal, and geometric figures drawn in the earth.

An elevator into the Baltic Sea.

The largest dune field in the Mojave offers a chance of hearing the 'singing sands.'

These unusual houses look like giant boats that washed ashore on a residential street.

At 130 years old and 126 feet tall, it is the largest known example of the rare Torrey pine tree.

Inky sludge oozes to the surface of this beach thanks to a rare natural tar seep.

Happy harbor seals frolic and snooze on this warm, sandy stretch of coast.

This “living museum” at UCLA exhibits thousands of plant species from all over the world.

The last occupied troglodyte dwellings in England weren't abandoned until the 1960s.

Some believe that this ancient mural depicts technology far ahead of its time, but in reality it's nothing quite out of place.

An Airy Would-Be Solution to a Housing Shortage.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

This aromatherapy shop and mini-museum cofounded by the Sigur Rós frontman documents Icelandic history through scents.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

Three million year old fossils are exposed for all to see on this Icelandic shore.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

The most powerful waterfall in all of Europe.

This elegant arc of a waterfall marks a religious turning point.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

Iceland's largest lagoon is home to stunning multi-colored icebergs.